Application and performance test of a micro-machined unipolar charger for real-time measurements of exhaust particles from a diesel engine vehicle

Sang Gu Lee, Junho Hyun, Dongho Park, Jungho Hwang, Yong-Jun Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Characterization of particulate matter (PM) emitted from diesel vehicle exhaust requires a real-time measurement sensor to record particle concentrations under transient tests. Recently, a micro-machined unipolar charger (MUC) based on a micro-electromechanical system (MEMS) was introduced and evaluated to test aerosol particles on a laboratory scale. We present the performance characteristics of the MUC for its potential use as a sensor for diesel PM emissions. A correlation equation was derived from particle loss experiments and tandem differential mobility analyzer (TDMA) measurements in the laboratory, which was used to convert the current measurement datum into a total particle number concentration. Under various idling and driving conditions of a diesel vehicle, the electrical signals from the MUC were verified to have followed the trend of the total number concentrations of diesel PM measured using a condensation particle counter (CPC). When the diesel PM concentrations measured using the CPC were within the range of 2×104-2×105#/cm3, the total number concentrations, estimated using a correlation equation, were in agreement with the CPC data.

Original languageEnglish
Pages (from-to)747-758
Number of pages12
JournalJournal of Aerosol Science
Volume42
Issue number11
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

Radiation counters
Particulate Matter
diesel engine
Time measurement
Diesel engines
Condensation
diesel
particulate matter
condensation
Sensors
Electric current measurement
Particles (particulate matter)
Aerosols
MEMS
sensor
test
particle
vehicle
Experiments
aerosol

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

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title = "Application and performance test of a micro-machined unipolar charger for real-time measurements of exhaust particles from a diesel engine vehicle",
abstract = "Characterization of particulate matter (PM) emitted from diesel vehicle exhaust requires a real-time measurement sensor to record particle concentrations under transient tests. Recently, a micro-machined unipolar charger (MUC) based on a micro-electromechanical system (MEMS) was introduced and evaluated to test aerosol particles on a laboratory scale. We present the performance characteristics of the MUC for its potential use as a sensor for diesel PM emissions. A correlation equation was derived from particle loss experiments and tandem differential mobility analyzer (TDMA) measurements in the laboratory, which was used to convert the current measurement datum into a total particle number concentration. Under various idling and driving conditions of a diesel vehicle, the electrical signals from the MUC were verified to have followed the trend of the total number concentrations of diesel PM measured using a condensation particle counter (CPC). When the diesel PM concentrations measured using the CPC were within the range of 2×104-2×105#/cm3, the total number concentrations, estimated using a correlation equation, were in agreement with the CPC data.",
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Application and performance test of a micro-machined unipolar charger for real-time measurements of exhaust particles from a diesel engine vehicle. / Lee, Sang Gu; Hyun, Junho; Park, Dongho; Hwang, Jungho; Kim, Yong-Jun.

In: Journal of Aerosol Science, Vol. 42, No. 11, 01.01.2011, p. 747-758.

Research output: Contribution to journalArticle

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